A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode outer-encoded bits to generate an LDPC codeword including LDPC information bits and parity bits; a puncturer configured to puncture some of the parity bits included in the LDPC codeword; and a mapper configured to map the LDPC codeword except the punctured parity bits to symbols for transmission to a receiver, wherein the puncturer calculates a number of parity bits to be punctured among the parity bits included in the LDPC codeword based on a number of the outer-encoded bits, a number of the LDPC information bits, and a minimum number of parity bits to be punctured among the parity bits included in the LDPC codeword.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The TV broadcast signal transmitting method of claim 1, further comprising removing zero padding bits among the information bits.
3. The TV broadcast signal transmitting method of claim 2, wherein A represents a ratio of the number of parity bits to be punctured to a number of the zero padding bits to be removed, and the B represents a minimum number of the Npunc_temp.
5. The receiving method of claim 4, wherein the information bits comprise one or more zero padding bits and the input bits.
6. The receiving method of claim 5, wherein A represents a ratio of a number of parity bits to be punctured to a number of zero padding bits to be removed, and the B represents a minimum number of the Npunc_temp.
7. The receiving method of claim 4, wherein a modulation order for the demodulating is 2 in the first mode, and a modulation order for the demodulating is 2 in the second mode.
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July 25, 2023
September 3, 2024
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